An epic bug hunt featuring a unique blend of co-op play and squad-level tactics. With your friends, form a squad of four distinct IAF Marine classes. Plan your attack using an unlockable arsenal of weapons with countless loadout configurations against a wide variety of aliens. Blaze your way through an overrun, off-world colony, eradicating the alien infestation in environments ranging from the icy planet's surface, to a subterranean lava-flooded mining facility.

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Lambda Wars
Alien Swarm

1. Lambda Wars

5 months ago Released Sep 2012 Single & Multiplayer Real Time Strategy

Lambda Wars (formerly Half-Life 2: Wars) brings the struggle between the human resistance and their Combine overlords to a multiplayer real-time strategy...

Modular Combat 2
Alien Swarm

2. Modular Combat 2

7 months ago TBD Multiplayer & Co-op First Person Shooter

Modular Combat 2 is an upcoming role-playing shooter based in the Half-Life universe. The game will feature upgraded graphics with custom shaders, AI...

Alien Swarm: Reactive Drop
Alien Swarm

3. Alien Swarm: Reactive Drop

3 months ago Released Apr 9, 2014 Single, Multiplayer & Co-Op Arcade

Adds new PvP game modes, co-op features and singleplayer support into Alien Swarm without changing its concept.

Hypovolemia
Alien Swarm

4. Hypovolemia

2 weeks ago Released May 2012 Single & Multiplayer Third Person Shooter

HYP is real time tactical shooter with chess like awareness and high skill ceiling. The game focuses on intricate game design while offering a unique...

The Survival
Alien Swarm

5. The Survival

4 months ago TBD Single Player First Person Shooter

The Survival is an episodic Source Engine total conversion mod with an original storyline and unique cast of characters. Play your way through a post-apocalyptic...

Omnibus
Alien Swarm

6. Omnibus

4 years ago TBD Single & Multiplayer Arcade

Warhammer 40k mod for Alien Swarm. You play as one of four members in a Space Marine squad and you're sent to a Tyranid infected planet to investigate

ALIEN SWARM FP
Alien Swarm

7. ALIEN SWARM FP

1 year ago TBD Co-op First Person Shooter

This is a first person view modification of "Alien Swarm"

ASB²  mod
Alien Swarm

8. ASB² mod

3 years ago Released Jul 2012 Multiplayer Tactical Shooter

ASB² mode (alien swarm beyond brutal) is a reborn ASBi game mode emphasizing the higher degree of difficulty, which includes the invalidity of such options...

Lylat's Last Stand
Alien Swarm

9. Lylat's Last Stand

1 year ago TBD Single & Multiplayer Third Person Shooter

SFR (WIP title) is a mod for the Source Engine. It's based on the 3d shooter game Starfox. It will be mostly based on the 1993 nintendo power comics...

Black Mesa Swarm
Alien Swarm

10. Black Mesa Swarm

3 months ago Released Dec 20, 2013 Single & Multiplayer First Person Shooter

Black Mesa Swarm is an Alien Swarm total conversion remaking Valve Software's award-winning PC game, Half-Life.

Vectronic
Alien Swarm

11. Vectronic

7 months ago TBD Single Player Puzzle Compilation

Vectronic is a first-person environmental puzzle mod using Valve's Source Engine. Players must solve puzzles using special power balls that effect boxes...

Alien Swarm Director Mod
Alien Swarm

12. Alien Swarm Director Mod

1 year ago Released Nov 2011 Single Player Third Person Shooter

Welcome to the Alien Swarm Director Mod! ASDM is a single player Alien Swarm mod focusing on increasing replayability by creating a dynamic experience...

Optic
Alien Swarm

13. Optic

7 months ago TBD Multiplayer First Person Shooter

Optic is a team-based multiplayer shooter where players can take the role of either a fast-moving runner or a slow-moving hunter.

ALIENS
Alien Swarm

14. ALIENS

1 year ago TBD Single & Multiplayer Tactical Shooter

A mod for Alien Swarm that is based on the ALIENS movie but for a set of new marines to go and investigate LV426 and see what happened there! (This is...

Alien Swarm Aliens Mod
Alien Swarm

15. Alien Swarm Aliens Mod

4 years ago Released Nov 2010 Single & Multiplayer Tactical Shooter

this "mod" will replace weapon's data and sounds for alien swarm making it feel like Aliens. Furthermore, maps will be made for this mod and the final...

B.R.I.S.k.
Alien Swarm

16. B.R.I.S.k.

2 years ago TBD Single Player Arcade

B.R.I.S.k. is a game with unique gameplay developed by a team «Two On The One Box», which has created a modification for the game Portal 2 - Afterword...

Chaos Swarm Marines
Alien Swarm

17. Chaos Swarm Marines

2 months ago Released May 29, 2015 Single, Multiplayer & Co-Op Third Person Shooter

There new mod for Alien Swarm, so on release we have new models and custom particles. More new portraits and other changes.

Space Swarm Marines
Alien Swarm

18. Space Swarm Marines

2 months ago Released May 5, 2015 Single, Multiplayer & Co-Op Third Person Shooter

New mod Space Marines for Alien Swarm. :)

Alien Swarm:SP
Alien Swarm

19. Alien Swarm:SP

1 year ago Released Feb 2011 Single Player Third Person Shooter

Play the official Alien Swarm maps and any addons through the Offline Practice mode. Alien Swarm:SP also supports a large amount of configurable changes...

Brawlers
Alien Swarm

20. Brawlers

2 years ago TBD Multiplayer Third Person Shooter

After the dust had settled from the worlds greatest war, stockpiles of defunct weapons and ammunitions around Europe were scheduled for destruction. Private...

Uprise
Alien Swarm

21. Uprise

3 years ago TBD Multiplayer First Person Shooter

The Resistance have mobilized agaisnt the Combine, causing the streets of City 17 to be turned into a warzone. Fight for the Resistance as a Rebel or...

Apocalypse-22
Alien Swarm

22. Apocalypse-22

6 months ago TBD Single, Multiplayer & Co-Op First Person Shooter

Apocalypse cuenta la historia de Abigaíl, una mujer de 28 años de edad en un futuro apocalíptico y sin memorias de su pasado. (Historia en desarrollo)

Swarm Director 2
Alien Swarm

23. Swarm Director 2

1 month ago Released Jul 4, 2014 Single & Co-op Third Person Shooter

Alien Swarm with a twist. Better AI, new mutations, new mapper tools.

Zombie Swarm.
Alien Swarm

24. Zombie Swarm.

1 year ago TBD Multiplayer Third Person Shooter

Greetings, members of ModDB. My name is Kenny, and I am currently the sole team member of the Zombie Swarm team. I originally started this project in...

Phobos Incident
Alien Swarm

25. Phobos Incident

5 years ago TBD Multiplayer Third Person Shooter

Phobos Incident is going to be a full-fledged campaign for Alien Swarm. It can be considered as a re-imagining or an alternate future for the base that...

Alien Swarm SDK Template Conversion
Alien Swarm

26. Alien Swarm SDK Template Conversion

3 years ago Released Mar 2012 Single & Multiplayer First Person Shooter

C_b_fofep and I decided to convert the Alien Swarm build back into an FPS source engine version. This takes the orange box or the SDK template code and...

Infestation
Alien Swarm

27. Infestation

4 years ago TBD Multiplayer Third Person Shooter

Lots more details in latest news post, looking for more team members too - if you feel you have something you could add to the mod send me a pm for a...

Alien Swarm: Rifle Mod
Alien Swarm

28. Alien Swarm: Rifle Mod

1 year ago Released Jan 2014 Single & Co-op Arcade

Rifle Mod is an Alien Swarm server-only mod that forces players to play with assault rifles only, harder aliens, more ammo, smarter bots. However rifle...

Alien Swarm: The Darkness
Alien Swarm

29. Alien Swarm: The Darkness

4 years ago TBD Single & Multiplayer Tactical Shooter

The Darkness is a mod designed to put the players into a much more difficult position than that of the original Alien Swarm, by removing a lot of lighting...

SourceForts 2
Alien Swarm

30. SourceForts 2

2 years ago TBD Multiplayer First Person Shooter

Redefine the environment around you. SourceForts 2 is a FPS game designed around building your base and battling against the opposing team in order to...

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Alien Swarm
Platform
Windows
Developer & Publisher
Valve
Engine
Source
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Official Page
Alienswarm.com
Release Date
Released Jul 2010
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Popular Mods
Lambda Wars (Alien Swarm)
Lambda Wars Alien Swarm - Single & Multiplayer Real Time Strategy
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Modular Combat 2 Alien Swarm - Multiplayer & Co-op First Person Shooter
Alien Swarm: Reactive Drop (Alien Swarm)
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Hypovolemia (Alien Swarm)
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The Survival (Alien Swarm)
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Omnibus (Alien Swarm)
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ALIEN SWARM FP (Alien Swarm)
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ASB²  mod (Alien Swarm)
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Lylat's Last Stand (Alien Swarm)
Lylat's Last Stand Alien Swarm - Single & Multiplayer Third Person Shooter
Black Mesa Swarm (Alien Swarm)
Black Mesa Swarm Alien Swarm - Single & Multiplayer First Person Shooter
Vectronic (Alien Swarm)
Vectronic Alien Swarm - Single Player Puzzle Compilation
Alien Swarm Director Mod (Alien Swarm)
Alien Swarm Director Mod Alien Swarm - Single Player Third Person Shooter
Optic (Alien Swarm)
Optic Alien Swarm - Multiplayer First Person Shooter
ALIENS (Alien Swarm)
ALIENS Alien Swarm - Single & Multiplayer Tactical Shooter
Alien Swarm Aliens Mod (Alien Swarm)
Alien Swarm Aliens Mod Alien Swarm - Single & Multiplayer Tactical Shooter